Mann Whitney Test Spss. Here you need to move the dependent variable protein x concentration in the example into the window called test variable list. For example you could use the mann whitney u test to understand whether attitudes towards pay discrimination where attitudes are measured on an ordinal scale differ based on gender i e your dependent variable would be attitudes towards pay discrimination and your independent variable would be gender which.
The most common scenario is testing a non normally distributed outcome variable in a small sample say n 25. That is to say it is a nonparametric test as the analysis is undertaken on the rank order of the scores and so does not require the assumptions of a parametric test. Essentially the mann whitney u test is the non parametric equivalent of the parametric independent samples t test.
This means we can use the value of z to derive our p value.
The mann whitney u test is used to compare differences between two independent groups when the dependent variable is either ordinal or continuous but not normally distributed. That is to say it is a nonparametric test as the analysis is undertaken on the rank order of the scores and so does not require the assumptions of a parametric test. Fill in the necessary values to perform the test. Perform the following steps to conduct a mann whitney u test in spss.
